Thermal Expansion of REE3BSi2O10 (REE = Nd, Eu, Gd) Borosilicates
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Abstract
Abstract Three borosilicates with the general formula of REE3BSi2O10 (REE = Nd, Eu, Gd) were obtained by the high-temperature solid-state synthesis and studied by powder high-temperature X-ray diffraction (HTXRD) in the temperature range from 30 up to 1050°C. The HTXRD study showed that these borosilicates (orthorhombic, Pbca space group) have similar, nearly isotropic thermal expansion in the whole temperature range; the average coefficients of thermal expansion (CTE) were: 〈αa〉 = 9.6, 〈αb〉 = 8.3, 〈αc〉 = 8.7, with αmax – αmin ≤ 1.2 × 10–6°С–1. The average volume CTE insignificantly decreases with increasing the cation size from 27.2 for Eu and 27.0 for Gd down to 25.8 × 10–6°С–1 for Nd compound while the unit cell volume increases with increasing the REE cation radii in the REE3BSi2O10 series.
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OpenAlex topics: Nuclear materials and radiation effects · Thermal Expansion and Ionic Conductivity · Luminescence Properties of Advanced Materials
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References (20)
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